根据欧洲国家这么高效的隔离英国,这个变异的病毒不简单,不会是仅仅传染性更强,而是有更可怕的后果。而且英国九月就发现了这个变异病毒,而现在才公布,说明疫苗肯定无效。大家要小心,尽量不要出门。明年三月底前会有更多的人遭殃!

过几天就该见分晓了。。。。

英国已经接种了50万人,还在增加,看看过几天有没有接种的人感染,感染的是哪种新冠。。。
 
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1 hr 38 min ago

BioNTech CEO tells CNN the vaccine could be adjusted to better combat new Covid-19 variant​

From CNN’s Fred Pleitgen

A pharmacist prepares a dose of the Pfizer-BioNTech Covid-19 vaccine for front-line health care workers on December 19 in Torrance, California.
A pharmacist prepares a dose of the Pfizer-BioNTech Covid-19 vaccine for front-line health care workers on December 19 in Torrance, California. Patrick T. Fallon/AFP/Getty Images

The Pfizer/BioNTech vaccine could be adjusted to better combat the new variant of the Coronavirus, BioNTech’s CEO Ugur Sahin told CNN’s Fred Pleitgen in an interview on Tuesday.

"We should not forget that we have still the opportunity, if required, to adjust the vaccine exactly to this new virus variant, if this is needed," Sahin said.
"I don't think that this is needed. But if it would be needed, there's a technical possibility to do that."

Sahin told CNN that BioNTech is currently evaluating how effective the vaccine is against the recently discovered variant of the virus, which has caused dozens of countries to shut down travel to the United Kingdom. Sahin said he has "scientific confidence" that the vaccine will still work.

"There's a high likelihood that the vaccine response will be able also to inactivate this virus, because you have to consider that even though nine amino acids are changed in this protein, 99 percent of the protein is not changed," Sahin said, adding that BioNTech has already detected part of the immune response was not affected by the mutation.

"What we already did is we evaluated the sites where we have observed T cell responses against spike protein, and we see that almost all sites that we have seen T cell responses are still conserved. And so that is a good message. That means at least one component of the immune system will not be affected by this mutation," Sahin added.

On Monday Pfizer/BioNTech received approval for their vaccine from the EU’s regulatory body, the European Medicines Agency. Sahin told CNN the vaccine would be rolled out ASAP and that the companies are already working on ways to speed up production.

"We are evaluating if we could intensify the production at the Pfizer sites and intensify the production at the Mainz sites. So there are multiple things, which are ongoing."
 
外国人的话信不得。
 
最后编辑:
mRNA 疫苗针对的是S-突刺蛋白。
而这次变异据说也是这个蛋白。
美国的两款mRNA疫苗可能失效, 或者效果减少。
当然也可能没影响。有待进一步研究。
已经有报道,辉瑞疫苗对英国新变异病毒有效。
 
已经有报道,辉瑞疫苗对英国新变异病毒有效。



现在下的结论还不可靠。
正好英国在大规模打疫苗,到时候看看疫苗的免疫效果是不是降低就知道了。
这个需要时间来观察。
 
灭活疫苗可以打补丁。
mRNA疫苗不行。
因为mRNA疫苗依赖人体细胞系统翻译mRNA成蛋白质,
这个要做很多实验。

灭活疫苗只要在制造的时候,用新的即变异的病毒来灭活就行了。
陈院士研发可是腺体病毒载体5型疫苗(5型在这一类中比较落后的一种),可不是什么灭活疫苗。

mRNA只要六周就可以更新 Spike Protein的基因表达造出新疫苗

目前据说变异S蛋白只有10%变化,可能目前mRNA疫苗仍然有效
 
相对mRNA较传统的灭活疫苗,mRNA疫苗的优点实在是太突出了。灭活疫苗是使用死亡或者减毒的病原菌,注射入人体,让人体产生抗体。这类疫苗生产周期长(病毒只能在细胞里繁殖)、成本高(需要大量的细胞和营养液)、防疫效果不佳(病毒变异快)、副作用较大(死亡病原体是超大分子蛋白)。

仅仅一个病毒变异,就可能让灭活疫苗的保护功能大大下降。这样的灭活病毒进入人体,人体产生的抗体会和病毒刺突蛋白结合(红色椭圆圈处),让杀毒细胞杀死病毒。但病毒变异后,人体产生的椭圆抗体不认识原来的结合点,变异病毒结合点变成了后面不规则的红色圈圈,先前的灭活疫苗则不再有保护作用了,抗体“抓不住”病毒,杀毒细胞就没办法杀死病毒。即使牛津大学目前号称的腺病毒载体疫苗,和mRNA疫苗也是无法比拟的,除了成本、保护率等,短时间大批量生产也是一个很大的难题。

而mRNA疫苗则有效避免了上述的缺点,其针对性强(针对病毒刺突蛋白),一旦病毒变异,生产源端很容易改变mRNA的序列,产生针对变异后病毒的疫苗,尤其是其只是一段核苷酸序列分子,源头极易生产,成本极低,对这次波及全球的疫情,可以在最短的时间,生产足够的mRNA疫苗,满足市场需求。
只要有Common Sense的人都知道mRNA疫苗优于灭活疫苗和腺体病毒载体(改基因)疫苗
 
陈院士研发可是腺体病毒载体5型疫苗(5型在这一类中比较落后的一种),可不是什么灭活疫苗。

mRNA只要六周就可以更新 Spike Protein的基因表达造出新疫苗

目前据说变异S蛋白只有10%变化,可能目前mRNA疫苗仍然有效


更改mRNA后, 六周够做3期临床试验?
那这次怎么用了10个月呢?
 
只要有Common Sense的人都知道mRNA疫苗优于灭活疫苗和腺体病毒载体(改基因)疫苗


现在大家打的流感疫苗就是灭活疫苗。
如果mRNA疫苗这么好? 流感疫苗为什么不用mRNA疫苗?
 
事实是, mRNA疫苗发生了过敏,面瘫和死亡。
中国的两款灭活疫苗在全世界10几个国家测试, 没听说这些情况。
从理论上讲, 灭活疫苗比mRNA更容易过敏(大分子蛋白质 。。),据报道那2个过敏医护人员是带着肾上腺激素去打mRNA疫苗的,人家是本来就对疫苗过敏, 面瘫:并无显示疫苗组比对照组更高面瘫。

疫苗副作用有两种:一种关联性,一种耦合性。 人家韩国今年冬天打(灭活)流感疫苗死了 好几十个了(11月就有40左右),韩国政府调查,打疫苗之后死的人与疫苗有关,这属于耦合性反应,那就是不打疫苗也可能死。
 
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